lkml.org 
[lkml]   [2018]   [Aug]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectPatch "asm-generic/bitops/lock.h: Rewrite using atomic_fetch_" causes kernel crash
Date
Hi Guys,
Since v4.19-rc1 we are getting a serious regression on platforms with ARC architecture.
The kernel have become unstable and spontaneously crashes on LTP tests execution / IO tests or
even on boot.

I don't know exactly what breaks but bisect clearly assign the blame to this commit:
84c6591103db ("locking/atomics, asm-generic/bitops/lock.h: Rewrite using atomic_fetch_*()")
https://github.com/torvalds/linux/commit/84c6591103dbeaf393a092a3fc7b09510825f6b9

Reverting the commit solves this problem.

I tested v4.19-rc1 on ARM (wandboard, i.mx6, 32bit, quard core, ARMv7) which uses same
generic bitops implementation and it works fine.

Do you have any ideas what went wrong?
--
Eugeniy Paltsev
\
 
 \ /
  Last update: 2018-08-29 20:35    [W:0.710 / U:0.760 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site